Process of shading drawings



(No Model.) a

H. R. MAAS.

PROCESS OF SHADING DRAWINGS. No. 282,653. Patented Aug. 7, 1883.

74 ithesseS. Inventor.

u. PETERS. PhQmnm mn-r. wimn xm a. c.

Nrrn STATES HARRY n. MAAS, or BURLINGTON, NEW JERSEY.

PROCESS OF SHADING DRAWINGS.

SPECIFICATION forming part of Letters Patent No. 282,653, dated August '7, 1883.

Application filed August 19, 1E8'2. (No model.)

T 0 (LZZ whom it may concern:

Be it known that l, HARRY R. Ml-iAs, of Burlington, in the county of Burlington and State of New Jersey, have invented a new and valuable Improvement in Processes of Shad ing Drawings; and I do hereby declare that the following is a full, clear, an d exact description of the construction and operation of the same, reference being had to the annexed drawings, making a part of this specification,

and to the letters and figures of reference marked thereon.

Figure 1 of the drawings isa representation of a perspective view. Fig. 2 is a perspective of the stone. v

This invention relates to a process for making drawings for transfer to stone to print from, and has for its primary object the prepa ration of a drawing upon any ordinary orprepared paper or any other material and transfcrring directly to the printing-stone.

The second part of my invention has for its object to provide 'an improved process for producing the stipple or dotted or similar work upon drawings.

Heretofore stippling or dots, wave, straight, or curved lines of different widths or spaces, or the various combinations of the same, or other delicate portions of the shading or drawing of pictures or other objects for printing lithographically, have been made or produced by rubbing a crayon 011 a roughened or grained stone, or to draw or dot with a pen on a smooth surface or stone. Such operations are slow and expensive, each dot or stipple being made separately and distinctly by hand; and the process heretofore used consists in the use of transparent films having an inked printing-face in relief. Such films are attached to the stone or object upon which the drawing is to be made by means of an elaborate mechanical adjustment, whereupon a stylus or other instrument is used for pressing or printing on the stone the desired portions of the film designed to be used in the picture. The time required for such operation and to change the films for obtaining different relief-surfaces for the picture and inking the same in order to produce the necessary combinations of effect is a source of expense and annoyance. Again, another process heretofore employed is to make the drawings upon paper with a prepared roughened or stippled surface. The 01)- jection thereto is obvious. The paper having a uniform prepared surface gives a corresponding effect in the picture. Hence such process will not give the requisite variety of effects, as stippled work can only be obtained on dotted or stippled-suriaced paper and line or grained work-or similarly marked or prepared paper. XVhen the first two processes are practiced, the drawing made upon the stone has to be taken upon prepared paper and then put down on the printingstone. Such operation causes the drawing to lose much of the delicate shading and gives to it a coarse and unfinished appearance. My invention avoids all such disadvantages, and stippled or dotted work, grained, curved, or waved lines are obtained or produced on the printing -stone of great sharpness and delicacy. Consequently more open, cleaner, and more distinct impressions are obtained. The work upon such. stone be ing better defined, it is not so apt to clog or choke up and smear, as has been the ease with -work engraved inthe usual way.

My invention accordingly consists in first taking a plate or piece of paper, card-board, celluloid, stone, various fabrics or similar materials or metals, or combinations of the same, such surfaces being cit-her smooth or already roughened. Such surfaces may be roughened to form dots or stipples, grained, curved, or waved lines or combinations thereof, and such original plate I call a relief-plate. A series of the plates are provided, one having dots formed thereon in relief, another curved lines,

tle pressure over such portions of the picture whereon the stipples or dots or other shading as appear in the relief-plate are required, and such stippled dots or other shading are in a short time reproduced upon the paper by such rubbing over the roughened surface with the crayon. If a different style of stipple is de and so on until, if desired, a plate is obtained -vious that by simply exchanging the reliefplates or originals, as prepared or roughened to produce different styles and sizes of dots, lines, 8m, a monotonous uniformity of shading is avoided. After the drawing is so prepared it is transferred to the printing-stone and impressions taken therefrom. Such impressions are clear and distinct, giving a finished appearance to. the drawing. From the fact that the engraving upon the stone is distinct and open the ink does not clog or choke up the same nor smear thereon.

In the accompanying drawings, Fig. l is a perspective View, wherein A shows aprepared roughened plate, 13 the drawin arranged there- &c., are wanted upon the drawing, the

and O the pencil or crayon for forming the Fig. 2 shows a perspective shading thereon. of the stone. p

The paper upon which the drawings are made by my improved process may be plain or of any other desirable or suitable make, no special preparation of the same being neces sary.

What I claim as my invention is- The process of preparing drawings, pictures, &c., to transfer on stone or other material that may be printed from, which consists in first preparing one or a series of plates having stipples or dots, waved, curved lines, or other shading formed thereon in relief, then placing a sheet of paper or the picture thereon, and reproducing such shading upon said paper by means of a pencil or crayon, and then transferring said drawing directly to the stone, substantially as shown and described.

In testimony that I claim the above I have hereunto subscribed my name in the presence of two witnesses. HARRY R. MAAS.

WVitn esses:

MATT. CLIFTON, GEORGE XV. SELTZER. 

